block: Drop locking annotation for limits_lock

Currently compiling block/blk-settings.c with C=1 gives the following
warning:
block/blk-settings.c:262:9: warning: context imbalance in 'queue_limits_commit_update' - wrong count at exit

request_queue.limits_lock is a mutex. Sparse locking annotation for
mutexes are currently not supported - see [0] - so drop that locking
annotation.

[0] https://lore.kernel.org/lkml/[email protected]/T/#mbb8bda6c0a7ca7ce19f46df976a8e3b489745488

Fixes: d690cb8 ("block: add an API to atomically update queue limits")
Signed-off-by: John Garry <[email protected]>
Reviewed-by: Bart Van Assche <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

Author: johnpgarry

block/blk-settings.c

@@ -303,7 +303,6 @@ int blk_set_default_limits(struct queue_limits *lim)
  */
 int queue_limits_commit_update(struct request_queue *q,
 		struct queue_limits *lim)
-	__releases(q->limits_lock)
 {
 	int error;
 

include/linux/blkdev.h

@@ -893,7 +893,6 @@ static inline unsigned int blk_chunk_sectors_left(sector_t offset,
  */
 static inline struct queue_limits
 queue_limits_start_update(struct request_queue *q)
-	__acquires(q->limits_lock)
 {
 	mutex_lock(&q->limits_lock);
 	return q->limits;